WO2019030829A1 - Station de base, terminal, et procédé d'attribution de ressources radio - Google Patents

Station de base, terminal, et procédé d'attribution de ressources radio Download PDF

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Publication number
WO2019030829A1
WO2019030829A1 PCT/JP2017/028810 JP2017028810W WO2019030829A1 WO 2019030829 A1 WO2019030829 A1 WO 2019030829A1 JP 2017028810 W JP2017028810 W JP 2017028810W WO 2019030829 A1 WO2019030829 A1 WO 2019030829A1
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WO
WIPO (PCT)
Prior art keywords
terminal
base station
bsr
radio resource
transmission
Prior art date
Application number
PCT/JP2017/028810
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English (en)
Japanese (ja)
Inventor
賢司 加瀬
福井　範行
啓二郎 武
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2017/028810 priority Critical patent/WO2019030829A1/fr
Priority to JP2018500811A priority patent/JP6351898B1/ja
Publication of WO2019030829A1 publication Critical patent/WO2019030829A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to a base station that communicates with a terminal using beamforming, a terminal, and a radio resource allocation method.
  • scheduling request (SR: Scheduling Request) and buffer status are provided as messages requesting allocation of radio resources necessary for uplink data communication from the terminal to the base station.
  • a report (BSR: Buffer Status Report) has been defined (see Non-Patent Document 1).
  • the base station allocates radio resources used by the terminal for BSR transmission when receiving the SR from the terminal. Furthermore, the base station specifies the amount of uplink user data held by the terminal based on the buffer status reported from the terminal using BSR, and transmits the radio resource for transmission of uplink user data to the terminal. Allocate
  • a Physical Uplink Control Channel (PUCCH) is used for SR transmission, and a Physical Uplink Shared Channel (PUSCH) is used for BSR transmission.
  • the PUSCH is also used when the terminal transmits uplink user data to the base station.
  • a terminal transmits SR to a base station using PUCCH, and requests allocation of PUSCH, when PUSCH is not allocated from a base station, when uplink user data generate
  • Configuration information representing a radio resource used by the terminal in SR transmission can be configured by the base station using sr-ConfigIndex of the RRC (Radio Resource Control) layer (see Non-Patent Document 2).
  • SR configuration information is SR subframe offset (SR subframe offset) and SR period (SR periodicity), and values of SR subframe offset and SR period that can be set in sr-ConfigIndex are described in Non-Patent Document 3 It is fixed.
  • the terminal After transmitting the SR, the terminal transmits a BSR to the base station using the assigned PUSCH when the PUSCH is assigned.
  • the terminal transmits a BSR to the base station using the assigned PUSCH.
  • the setting information of BSR can be set by the base station in Mac-MainConfig of the RRC layer (see Non-Patent Document 2).
  • the base station can not detect whether or not uplink user data is generated in the terminal until it receives an SR. Therefore, the base station allocates radio resources for SR transmission to each terminal at predetermined timing using the above SR subframe offset and SR cycle, and waits for SR from each terminal. That is, PUCCH, which is a radio resource for SR transmission, is periodically allocated to each terminal, and uplink user data is generated in a state where PUSCH, which is a radio resource for BSR transmission, is not allocated. , SR transmitted to request allocation of radio resources for BSR transmission using PUCCH assigned for SR transmission.
  • PUCCH which is a radio resource for SR transmission
  • the above SR setting information and BSR setting information may use the same value or different values among a plurality of terminals.
  • 5G fifth generation mobile communication system
  • operation in a high frequency band typified by a millimeter wave is expected for further expansion of data communication capacity.
  • radio wave propagation loss also increases. Therefore, to compensate for these losses, beam forming techniques are introduced in the base station and the terminal.
  • Beamforming is a technology that makes it possible to obtain antenna gain by concentrating radio waves in a specific direction, and to prevent or reduce interference in other directions as well as interference of radio waves coming from other directions.
  • a base station realized by applying the beamforming technology forms a beam in the direction in which the terminal of the communication partner exists or in the direction in which the terminal of the communication partner may exist.
  • the number of beams that can be simultaneously generated by one base station is limited.
  • the base station needs to perform control to switch the direction of beams in time division.
  • the area irradiated by one beam is expressed as a beam spot.
  • the service area provided by the base station is composed of one or more beam spots.
  • the base station can allocate radio resources for the entire service area. Therefore, the base station receives SRs or BSRs from a certain terminal using some radio resources, and other radio resources exist in the other radio resource in a different direction from the SR or BSR source terminal. It was possible to assign to a terminal and receive signals from other terminals.
  • the allocation unit of the radio resource of the base station is not the entire service area but the beam spot unit. Therefore, when the base station irradiates the reception beam in a specific direction to receive SR or BSR from a certain terminal, it is possible to allocate PUSCH using the remaining radio resources when in the same beam spot Limited to other terminals.
  • the base station forms a beam for receiving SR according to the transmission timing of SRs by each terminal, and BSR.
  • radio resources not used in one beamforming may be generated. That is, when the number of times the base station forms a beam for receiving SR or BSR increases, it is considered that radio resources not used increase and the utilization efficiency of radio resources decreases.
  • each terminal in the service area when one service area is formed with a number of beam spots larger than the number of beams that can be simultaneously generated by the base station, each terminal in the service area while switching the beam direction in time division. Need to communicate with Therefore, if beam formation is frequently performed for a specific beam spot, the frequency of allocating radio resources to terminals located in other beam spots decreases, and transmission of uplink user data is delayed. The possibility is high.
  • the present invention has been made in view of the above, and it is an object of the present invention to obtain a base station capable of improving the use efficiency of radio resources.
  • the base station changes the direction in time division to a service area composed of a plurality of beam spots while changing the direction to one or more beam spots. It has an antenna unit for forming a beam to be directed.
  • the base station receives from the first terminal a scheduling request requesting allocation of a radio resource for transmitting a buffer status report, the base station is another terminal located in a beam spot in which the first terminal is located. Search for a second terminal and assign radio resources for transmission of buffer status reports to the first terminal and the second terminal.
  • the base station according to the present invention has the effect of being able to improve the use efficiency of radio resources.
  • FIG. 5 is a diagram showing an example of information elements of a BSR request transmitted by the base station according to the first embodiment.
  • a sequence diagram showing an operation example of a base station and a terminal according to the third embodiment A sequence diagram showing an operation example of a base station and a terminal according to the fourth embodiment
  • requirement to a terminal A sequence diagram showing an operation example of a base station and a terminal according to the fifth embodiment
  • Flowchart showing an operation example of the terminal according to the sixth embodiment Flow chart showing an operation example of a base station according to the sixth embodiment
  • FIG. 1 is a diagram showing a configuration example of a wireless communication system realized by a base station and a terminal according to the present invention.
  • the wireless communication system 10 is configured to include a base station 11 that performs communication by forming a beam, and a terminal 12 that communicates with the base station 11.
  • FIG. 1 shows an example in which three terminals 12 exist in the beam spot 13 transmitted by the base station 11.
  • the service area of the base station 11 is composed of a plurality of beam spots 13 shown in FIG.
  • the number of beam spots 13 constituting the service area is larger than the number of beams that can be generated simultaneously by the base station 11, and the base station 11 covers the entire service area by forming beams while switching the direction in time division. It shall be.
  • the number of terminals 12 located in the beam spot 13 is not limited to three.
  • the number of terminals 12 located in each beam spot may be two or less, or four or more.
  • FIG. 2 is a block diagram showing a configuration example of the base station 11 according to the present invention.
  • the base station 11 includes a control unit 20, a transmission / reception unit 24, and an antenna unit 25.
  • the control unit 20 includes a terminal search unit 21, a resource assignment unit 22, and a transmission information generation unit 23.
  • the terminal search unit 21 holds information indicating which beam spot each terminal 12 present in the service area is in, and when the above-described scheduling request (SR) is received from the terminal 12, SR The other terminal 12 located in the same beam spot as the beam spot in which the source terminal 12 is located is searched.
  • SR scheduling request
  • the resource assignment unit 22 assigns a radio resource for the terminal 12 to transmit a control message to the base station 11 to the terminal 12.
  • the control message that the terminal 12 transmits to the base station 11 is an SR, the above-mentioned BSR, or the like.
  • the resource allocation unit 22 also allocates to the terminal 12 a radio resource used by the terminal 12 for transmission of uplink user data.
  • the transmission information generation unit 23 generates control information to be transmitted to the terminal 12, such as information indicating the radio resource allocation result by the resource allocation unit 22.
  • the control information generated by the transmission information generation unit 23 also includes data of a control message such as BSR Request described later.
  • the transmission / reception unit 24 puts control information generated by the transmission information generation unit 23, downlink user data, and the like on a signal and transmits the signal to the terminal 12, and receives the signal transmitted from the terminal 12.
  • the signal received from the terminal 12 includes uplink user data, control message data such as the above-mentioned SR and BSR, and the like.
  • the antenna unit 25 forms a beam in a desired direction by beam forming, and transmits / receives a radio signal to / from the terminal 12 located in the beam spot 13.
  • the antenna unit 25 changes the direction of the beam to be formed by time division. That is, the antenna unit 25 forms a beam for communicating with the terminal 12 while changing the direction in time division toward the plurality of beam spots that configure the service area.
  • FIG. 3 is a block diagram showing a configuration example of the terminal 12 according to the present invention.
  • the terminal 12 includes a control unit 30, a transmission / reception unit 34, and an antenna unit 35.
  • the control unit 30 includes a buffer state management unit 31, a transmission control unit 32, and a transmission information generation unit 33.
  • the buffer state management unit 31 internally includes an uplink buffer for temporarily holding uplink user data to be transmitted to the base station 11, and the state of the uplink buffer, specifically, the uplink user data held by the uplink buffer. Monitor the amount of data.
  • the transmission control unit 32 controls the transmission operation of control messages such as SR and BSR.
  • the transmission information generation unit 33 generates control information to be transmitted to the base station 11. Examples of control information generated by the transmission information generation unit 33 are control messages such as SR and BSR.
  • the transmission / reception unit 34 puts control information generated by the transmission information generation unit 33, uplink user data, and the like on a signal and transmits the signal to the base station 11, and receives the signal transmitted from the base station 11.
  • the antenna unit 35 transmits and receives radio signals to and from the base station 11.
  • FIG. 4 is a diagram showing an example of a hardware configuration of the base station 11 according to the present invention.
  • the base station 11 is realized by, for example, the processor 41, the memory 42, the transmitter 43, the receiver 44, and the antenna device 45 illustrated in FIG.
  • the processor 41 is a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, processor, also referred to as DSP (Digital Signal Processor)), system LSI (Large Scale Integration), or the like.
  • the memory 42 is nonvolatile, such as random access memory (RAM), read only memory (ROM), flash memory, erasable programmable read only memory (EPROM), and EEPROM (registered trademark) (electrically erasable programmable read only memory). Or volatile semiconductor memory, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), or the like.
  • the terminal search unit 21, the resource allocation unit 22, and the transmission information generation unit 23 of the base station 11 store programs for operating as these units in the memory 42, and the processor 41 reads the programs from the memory 42. It is realized by executing.
  • the transmitting and receiving unit 24 is realized by the transmitter 43 and the receiver 44, and the antenna unit 25 is realized by the antenna device 45.
  • the processor 41, the memory 42, the transmitter 43, the receiver 44 and the antenna device 45 are connected by a system bus 46.
  • FIG. 5 is a diagram showing an example of the hardware configuration of the terminal 12 according to the present invention.
  • the terminal 12 is realized by the processor 51, the memory 52, the transmitter 53, the receiver 54, and the antenna device 55 shown in FIG.
  • the processor 51 and the memory 52 are devices similar to the processor 41 and the memory 42 shown in FIG.
  • the buffer state management unit 31, the transmission control unit 32, and the transmission information generation unit 33 of the terminal 12 store a program for operating as these units in the memory 52, and the processor 51 reads the program from the memory 52. It is realized by executing. Also, the transmitting and receiving unit 34 is realized by the transmitter 53 and the receiver 54, and the antenna unit 35 is realized by the antenna device 55.
  • the processor 51, the memory 52, the transmitter 53, the receiver 54 and the antenna device 55 are connected by a system bus 56.
  • the wireless communication system according to each embodiment is the wireless communication system 10 configured as shown in FIG. Further, the base station according to each embodiment is assumed to be the base station 11 configured as shown in FIG. A terminal according to each embodiment is a terminal 12 configured as shown in FIG.
  • FIG. 6 is a sequence diagram showing an operation example of the base station 11 and the terminal 12 according to the first embodiment.
  • the sequence shown in FIG. 6 represents an operation in which the base station 11 allocates radio resources for BSR transmission to the three terminals 12.
  • the three terminals 12 located in the beam spot 13 shown in FIG. 1 are the terminal A, the terminal B, and the terminal C, respectively.
  • the code of the base station 11 may be omitted and simply described as a base station.
  • the radio resource for SR transmission is a radio resource for scheduling request.
  • the base station 11 allocates radio resources for SR transmission to the terminal A, the terminal B, and the terminal C by using the setting information of the SR described above.
  • a cycle in which radio resources for SR transmission are allocated is represented by the above-described SR cycle.
  • Each terminal uses the PUCCH allocated for SR transmission to allocate radio resources for BSR transmission when uplink user data is generated in a state where PUSCH which is a radio resource for BSR transmission is not allocated. Send SR to request.
  • step S11 is a receiving step in which the base station receives an SR for requesting allocation of a radio resource for transmitting a BSR from the first terminal.
  • the base station specifies the beam spot in which the terminal A which is the first terminal is located, and the other terminal located in the same beam spot as the terminal A. Search is performed (step S12). The base station can know which beam spot each terminal in the service area is in by performing attach processing or handover processing with the terminals.
  • step S12 based on the information acquired and held when executing the attach process or the handover process with the terminal, the base station is another terminal located in the same beam spot as the terminal A.
  • Search for the second terminal which is This step S12 is a search step in which the base station searches for a second terminal which is another terminal located in a beam spot in which the first terminal is located.
  • the description will be continued on the assumption that the base station has searched terminal B and terminal C as a second terminal located in the same beam spot as terminal A.
  • the base station transmits, to the terminal A, a UL grant (UL Grant) for notifying assignment of PUSCH (step S13), and allocates a radio resource to be used for transmission of the BSR to the terminal A. Furthermore, the base station transmits a BSR request (BSR Request) to terminal B and terminal C (steps S14B and S14C), and similarly to terminal A, transmits radio resources used for BSR transmission to terminal B and terminal C. Allocate These steps S13, S14B and S14C are allocation steps in which the base station allocates radio resources for BSR transmission to the first terminal and the second terminal.
  • the BSR request is a control message newly defined to realize the present invention.
  • a base station transmits a BSR request
  • the BSR request includes, in addition to information indicating a BSR request and information indicating a terminal to which the BSR request is addressed, information indicating a radio resource to be allocated to the terminal.
  • the BSR request can be configured to include, for example, an information element similar to the UL grant.
  • the BSR request may have a configuration in which the information indicating the type of the UL grant message, that is, the information indicating the UL grant, is replaced with the information indicating the BSR request.
  • the base station can form a beam when receiving BSR from terminal A, terminal B and terminal C only once, in other words, with the beam formed to receive BSR from terminal A, terminal B and terminal A radio resource for BSR transmission is allocated to terminal B and terminal C at the BSR request so that the BSR from C is also received.
  • the base station transmits the UL grant and the BSR request in the same subframe.
  • the terminal A After receiving the UL grant, the terminal A transmits the BSR to the base station using the radio resource allocated by the UL grant (step S15). After receiving the BSR request, each of the terminals B and C transmits a BSR to the base station using the designated radio resource which is a radio resource allocated by the BSR request (steps S16B and S16C).
  • the terminal A, the terminal B, and the terminal C store, in the BSR, information on the amount of data of the uplink user data held therein.
  • terminal B and terminal C may not hold uplink user data at the timing when they receive the BSR request, it does not depend on the state of the uplink buffer, that is, does the uplink buffer hold uplink user data? Regardless of whether or not it is transmitted, the BSR is always transmitted to the base station.
  • the base station When the base station receives the BSR from the terminal A, the terminal B and the terminal C, the base station allocates radio resources to each terminal in consideration of the state of the uplink buffer of each terminal notified by the BSR, and UL grants to each terminal It transmits and notifies the allocation result of a radio
  • FIG. 6 shows an example where terminal A, terminal B and terminal C all hold uplink user data. Since the transmission timing of the UL grant depends on the uplink scheduling process of the base station, the base station does not necessarily transmit the UL grant to each terminal immediately after receiving the BSR.
  • PUCCH is periodically allocated to each terminal as a radio resource for SR transmission.
  • each terminal does not transmit SR regardless of the state of the upstream buffer, and for the PUCCH for SR transmission that comes next, transmission conditions for SR Send SR if it satisfies
  • the state satisfying the SR transmission condition is a state in which the uplink buffer holds uplink user data and no PUSCH is allocated.
  • the reception of SR from the terminals B and C is canceled without assigning the reception beams at the next SR reception timing for the terminals B and C (step S19). That is, the base station cancels the allocation of the allocated radio resources to receive the next SR from the terminal B and the terminal C, and does not form a reception beam.
  • the base station allocates reception beams for the terminals B and C at the next reception timing of SR, and forms reception beams.
  • Whether the base station 11 transmits the BSR request to the terminal 12 can be individually set in each of the base stations 11 that configure the wireless communication system. Also, the operation of the terminal 12 is not limited by not receiving the BSR request.
  • the example shown in FIG. 6 is an example where the base station transmits a BSR request to terminal B and terminal C triggered by transmission of SR by terminal A, but SR configuration information and uplink user data of each terminal
  • the base station does not always receive SR from the terminal A depending on the occurrence timing of.
  • the transmission of SR by the terminal B is triggered to transmit the BSR request
  • the transmission of SR by the terminal C may be triggered to transmit the BSR request.
  • the process of step S12 of the base station is performed in response to the reception of SR from any of the terminal A, the terminal B and the terminal C, and the terminal performing the process of triggering step S12 is performed. It is not limited.
  • FIG. 7 is a diagram of an example of information elements of a BSR request transmitted by the base station according to the first embodiment.
  • the information element is configured by a 1-bit parameter, and 1 is set to issue a BSR request, and 0 is set to not issue a BSR request.
  • the BSR request may be transmitted on the Physical Downlink Control Channel (PDCCH) in 4G, or a MAC CE (MAC CE) of a control message unit generated by Media Access Control (MAC), which is a sublayer of Layer 2. It may be transmitted by Control Element).
  • PDCCH Physical Downlink Control Channel
  • MAC CE Media Access Control
  • Control Element Control Element
  • the base station 11 is located in the same beam spot as the terminal 12 of the transmission source of SR, triggered by the reception of the SR from the terminal 12. It is decided to receive BSRs collectively from all the terminals 12 including the terminal 12 and cancel the allocation of the next SR reception beam of the other terminals. By this means, it is possible to reduce the number of times the base station 11 allocates beams for receiving SR and BSR in a case where settings for receiving SR from different terminals 12 located in the same beam spot are different. .
  • the base station 11 allocates a radio resource for BSR transmission to each terminal 12 so that the BSR can be received at the same beam from all the terminals 12 located in the same beam spot as the terminal of the transmission source of the SR.
  • the utilization efficiency of radio resources can be improved.
  • the base station 11 in the case where 0 is set in the buffer status (BS: Buffer Status) of the BSR transmitted by the terminal 12 receiving the BSR request described above. And the operation of the terminal 12 will be described.
  • the buffer state of the BSR represents the state of the upstream buffer of the transmission source terminal of the BSR.
  • differences from the first embodiment will be mainly described.
  • FIG. 8 is a sequence diagram showing an operation example of the base station 11 and the terminal 12 according to the second embodiment.
  • the sequence shown in FIG. 8 represents an operation when the buffer status of the BSR transmitted by the terminal C is 0, that is, the terminal C does not hold the uplink user data. Further, it is assumed that the buffer state of the BSR transmitted by the terminal B is a value larger than 0, and the terminal B holds upstream user data. Also, in FIG. 8, the same process as that of the sequence shown in FIG. 6 is assigned the same step number.
  • the terminal C having received the BSR request in step S14C sets the buffer state of the BSR to be transmitted in step S16C to 0.
  • step S16C If the base station detects that the buffer status of the BSR received from the terminal C is 0 in step S16C, it does not transmit a UL grant to the terminal C. That is, step S17C shown in FIG. 6 is not executed. Also, the base station does not cancel the allocation of reception beams at the next SR reception timing for terminal C (step S21).
  • the terminal C When the terminal C transmits a BSR with a buffer status of 0, the terminal C does not cancel transmission of SR at the next transmission timing of SR. That is, after transmitting the BSR whose buffer state is 0, the terminal C transmits an SR if the transmission condition of the SR is satisfied at the next transmission timing of the SR (step S22).
  • the base station 11 allocates the receiving beam at the next SR reception timing to the terminal that has transmitted the BSR whose buffer state is 0. Decided not to cancel.
  • a terminal that has transmitted a BSR with a buffer status of 0 can transmit an SR when uplink user data is generated by the next SR transmission timing.
  • the base station cancels the allocation of the SR reception beam for terminals not holding uplink user data, it is possible to prevent an increase in transmission delay of uplink user data.
  • the timing at which the UL grant is received from the base station is later than the timing at which the transmission of the SR is cancelled. Will be described. In the present embodiment, differences from the first embodiment will be mainly described.
  • FIG. 9 is a sequence diagram showing an operation example of the base station 11 and the terminal 12 according to the third embodiment.
  • the same process as that of the sequence shown in FIG. 6 is assigned the same step number.
  • the base station according to the third embodiment transmits a UL grant to terminal A (step S17A), and the next time terminal B and terminal C are received The reception of SR at the reception timing of SR is canceled (step S19).
  • the base station then transmits a UL grant to terminal B and terminal C (steps S31B and S31C). That is, the base station according to the present embodiment performs the transmission of the UL grant in steps S17B and S17C executed by the base station according to the first embodiment after step S19.
  • the terminal B and the terminal C execute steps S18B and S18C, respectively, after executing steps S16B and S16C, as in the first embodiment. Also, it is assumed that terminal B and terminal C can transmit uplink user data when they receive UL grant after executing steps S18B and S18C, respectively. Note that, as a result of the base station scheduling the radio resources after receiving the BSR, if no radio resource is allocated to the terminal that transmitted the BSR, the base station performs UL to the terminal to which the radio resource is not allocated. The grant is not sent. A terminal not receiving UL grant can not transmit uplink user data.
  • the scheduling of the base station as to when to transmit the UL grant and whether to transmit the UL grant to the terminal
  • the scheduling of the base station as to when to transmit the UL grant and whether to transmit the UL grant to the terminal
  • the base station 11 transmits the UL grant after canceling the next SR reception after receiving the BSR for the BSR request from each terminal.
  • the terminal when the terminal transmits a BSR upon receiving a BSR request, the terminal cancels the next transmission of SR. Even when such an operation is performed, the same effect as that of the first embodiment can be obtained.
  • step S17B and S17C of the sequence shown in FIG. 6 are performed after steps S19 as steps S31B and S31C has been described, but step S17B of the sequence shown in FIG. You may do so later.
  • FIG. 10 is a sequence diagram showing an operation example of the base station 11 and the terminal 12 according to the fourth embodiment.
  • the sequence shown in FIG. 10 targets the terminals whose buffer status is less than a predetermined threshold among the terminals in which the base station which has received the SR is located in the same beam spot as the terminal of the transmission source of SR. Represents the operation in the case of receiving BSR collectively.
  • a predetermined threshold value is assumed to be N, and N is an integer of 1 or more.
  • the unit of the threshold may be bits or bytes.
  • the buffer state of the terminal B is less than the threshold N and the buffer state of the terminal C is the threshold N or more.
  • the base station can estimate the buffer state of each terminal based on the buffer state notified by BSR received from each terminal in the past and the allocation result of radio resources to each terminal. Further, in FIG. 10, the same process as that of the sequence shown in FIG. 6 is assigned the same step number.
  • the base station 11 since the base station 11 does not take into account the buffer state of each of the terminals 12 that the base station 11 has received reports from each terminal 12 and grasped in the past, the same beam as the SR transmission source All the terminals 12 located in the spot, that is, the terminals B and C are targets for transmission of the BSR request.
  • terminals to which the BSR request is to be transmitted are limited according to the buffer status of each of the terminals 12 known to the base station 11. Therefore, the terminal C whose buffer status is equal to or more than the threshold N does not satisfy the constant condition and is not included in the transmission target of the BSR request.
  • the base station performs step S12 to search for terminals, and then determines whether to transmit a BSR request for each of the searched terminals (step S41). As described above, the base station confirms whether or not the buffer status of each of the searched terminals is less than the threshold N, and if the buffer status is less than the threshold N, it is assumed that the terminal satisfies the certain condition. Determine and send a BSR request. In the example shown in FIG. 10, the base station transmits a BSR request to the terminal B because the buffer state of the terminal B is less than the threshold N and the buffer state of the terminal C is the threshold N or more. It does not send a BSR request to terminal C.
  • the base station transmits a BSR request to the terminal B, and when a BSR is transmitted from the terminal B that has received this (step S16B), transmits a UL grant to the terminal B, and transmits the next SR for the terminal B. Cancel the reception of SR at the reception timing of (steps S17B and S42). Since the terminal C which is not the transmission target of the BSR request does not receive the BSR request, when the uplink user data is generated, the terminal C transmits an SR to the base station using a radio resource allocated in advance (step S43).
  • the base station 11 is a terminal 12 whose buffer status is less than the threshold N, that is, the amount of data of uplink user data held in the uplink buffer is less than the threshold N (in the example of FIG. Send the BSR request for
  • FIG. 11 is a flowchart showing an operation example in which the base station according to the fourth embodiment determines whether the transmission of the BSR request to the terminal is necessary or not. Specifically, the operation performed in step S41 shown in FIG. Flowchart of FIG. The operation illustrated in FIG. 11 is performed by, for example, the terminal search unit 21 or the transmission information generation unit 23 of the control unit 20 illustrated in FIG. Here, description will be made assuming that the terminal search unit 21 operates.
  • step S41 shown in FIG. 10 the terminal search unit 21 of the base station executes steps S111 to S114 shown in FIG. 11 for each of the terminals searched in step S12. Specifically, the terminal search unit 21 acquires a buffer state that has been reported in the past from the terminal to be processed from the storage unit whose description is omitted (step S111). When the acquired buffer status is N or more (step S112: Yes), the terminal search unit 21 does not set the processing target terminal as the transmission target terminal of the BSR request (step S113). On the other hand, when the buffer status is less than N (step S112: No), the terminal search unit 21 sets the processing target terminal as the transmission target terminal of the BSR request (step S114).
  • the base station does not necessarily transmit the BSR request to all other terminals located in the same beam spot as the SR transmission source terminal, but the terminal does not receive the BSR request. Is not limited. In the example shown in FIG. 10, since the base station does not transmit the BSR request to terminal C, the base station forms an SR reception beam at the next SR reception timing for terminal C, and the base station transmits the request from terminal C. Wait for SR.
  • the base station 11 when receiving the SR from the terminal 12, the base station 11 receives another terminal 12 located in the same beam spot as the terminal 12 that has transmitted the SR. Further, the buffer status of each retrieved terminal 12, ie, the status of the upstream buffer is confirmed, and the BSR request is not transmitted to the terminal 12 whose buffer status is the threshold N or more, and the next SR reception It was decided not to cancel the allocation of beam As a result, the same effect as that of the first embodiment can be obtained, and furthermore, it is possible to prevent the BSR request from being unnecessarily transmitted to the terminal 12 that the base station 11 recognizes that data has already been generated.
  • Embodiment 5 In the fifth embodiment, in the radio communication system 10 shown in FIG. 1, an embodiment will be described in which a terminal receiving a BSR request transmits a BSR when a certain condition is satisfied. In the present embodiment, differences from the first embodiment will be mainly described.
  • FIG. 12 is a sequence diagram showing an operation example of the base station 11 and the terminal 12 according to the fifth embodiment.
  • the sequence shown in FIG. 12 represents an operation in the case where a terminal receiving a BSR request transmits a BSR to the base station when its own buffer status is equal to or higher than a predetermined threshold.
  • a predetermined threshold value is M
  • M is an integer of 1 or more.
  • M is a value determined by a terminal, a base station or a standard.
  • the unit of the threshold may be bits or bytes.
  • the same step number is attached
  • each terminal 12 since each terminal 12 operates without considering the state of the uplink buffer, all the terminals 12 that have received the BSR request, that is, the terminals B and C go to the base station. Send BSR.
  • each terminal determines whether or not transmission of the BSR is necessary based on the state of its own upstream buffer. Therefore, the terminal B which is in the buffer state, that is, the state of the uplink buffer is equal to or more than the threshold M transmits BSR, and the terminal C whose buffer state is less than the threshold M does not transmit BSR.
  • the terminals B and C After receiving the BSR request in steps S14B and S14C, respectively, the terminals B and C according to the fifth embodiment determine whether it is necessary to transmit the BSR (steps S51B and S51C). Then, the terminal B whose buffer status is equal to or higher than the threshold M transmits BSR to the base station (step S16B), and the terminal C whose buffer status is less than the threshold M does not transmit BSR to the base station. Since the base station receives the BSR from the terminal B and does not receive the BSR from the terminal C, the base station transmits a UL grant to the terminal B and cancels the reception of SR at the next SR reception timing for the terminal B. (Steps S17B and S42). Also, the base station forms an SR reception beam at the next SR reception timing for terminal C and waits for SR from terminal C. That is, the base station receives an SR transmitted by the terminal C in step S53 described later.
  • the terminal B that has transmitted the BSR cancels the transmission of SR at the next transmission timing of SR (step S18B).
  • terminal C which does not transmit BSR does not cancel transmission of SR at the next transmission timing of SR, when uplink user data is generated by the next transmission timing of SR, it uses the radio resource allocated in advance. Then, SR is transmitted to the base station (step S53).
  • FIG. 13 is a flowchart illustrating an example of operation in which the terminal according to the fifth embodiment determines whether transmission of a BSR is necessary when receiving a BSR request.
  • FIG. 13 is a flowchart of an operation performed by the terminals B and C in steps S51B and S51C shown in FIG.
  • the transmission information generation unit 33 of the control unit 30 illustrated in FIG. 3 performs the operation illustrated in FIG. 13.
  • the flowchart shown in FIG. 13 will be described.
  • the transmission information generation unit 33 of the terminal acquires, from the buffer state management unit 31, information indicating the buffer state, that is, the state of the uplink buffer (step S121).
  • the transmission information generation unit 33 determines to transmit the BSR to the base station, and generates the BSR (step S123).
  • the transmission information generation unit 33 determines not to transmit the BSR to the base station (step S124).
  • the terminal 12 when receiving the BSR request, the terminal 12 confirms the buffer state, and transmits the BSR if the buffer state is equal to or more than the threshold M. If the buffer status is less than the threshold M, it is decided not to transmit the BSR. Thereby, the same effect as that of the first embodiment can be obtained.
  • FIG. 14 is a flowchart of an exemplary operation of the terminal according to the sixth embodiment.
  • the terminal repeatedly executes the operation shown in FIG. 14 at a predetermined timing.
  • the terminal may perform the operation shown in FIG. 14 each time it receives a control signal from the base station.
  • the terminal confirms the presence or absence of the reception of the BSR request from the base station at a predetermined timing (step S131), and ends the operation when the BSR request is not received (step S131: No).
  • the terminal receives the BSR request (step S131: Yes)
  • the terminal transmits the BSR to the base station 11 (step S132), and receives the UL grant by the next SR transmission timing (step S133: Yes)
  • the next transmission of SR is canceled (step S134).
  • ACK acknowledgement
  • ACK acknowledgement
  • a UL grant may be sent after that. Therefore, the terminal may cancel the next transmission of SR when it receives an ACK for the BSR.
  • step S135: Yes when the terminal receives the BSR retransmission request (step S135: Yes) without receiving the UL grant from the base station (step S133: No) by the next SR transmission timing, the process returns to step S132.
  • Send (resend) BSR When the terminal does not receive the BSR retransmission request by the next transmission timing of SR (step S135: No), the terminal can transmit the next SR (step S136). In this case, the terminal transmits an SR when uplink user data is generated by the next SR transmission timing.
  • the radio resource used by the terminal in the BSR retransmission is allocated in the BSR retransmission request.
  • the configuration of the BSR retransmission request may be similar to that of the BSR request. That is, a BSR retransmission request may be one in which "information indicating that it is a BSR request" included in the BSR request is replaced with "information indicating that it is a BSR retransmission request".
  • FIG. 15 is a flowchart of an exemplary operation of the base station according to the sixth embodiment.
  • the base station transmits a BSR request to the terminal, it starts an operation according to the flowchart shown in FIG. Also, the base station performs the operation according to the flowchart shown in FIG. 15 for each terminal. That is, when there are two terminals, the first terminal and the second terminal, to which the BSR request is to be transmitted, the base station transmits the BSR request to the first terminal and the second terminal, and then transmits the first BSR request.
  • An operation according to the flowchart shown in FIG. 15 is started for the terminal, and an operation according to the flowchart shown in FIG. 15 for the second terminal is started.
  • the base station transmits a BSR request to the terminal, and after forming a beam for receiving the BSR, confirms whether or not the BSR has been received from this terminal (step S141).
  • the base station receives the BSR from the terminal (step S141: Yes)
  • the base station cancels the allocation of the next SR reception beam of the terminal, that is, allocates the SR reception beam at the next SR reception timing. Instead, the reception of the SR from the terminal is canceled (step S142).
  • the base station transmits a UL grant to the terminal (step S143).
  • the base station may first transmit an ACK for the BSR and subsequently transmit a UL grant.
  • step S141 the base station checks whether the allocation cancellation timing of the SR reception beam has been exceeded (step S144).
  • step S144 the base station allocates the SR reception beam without canceling the allocation of the next SR reception beam (step S148), and proceeds to step S141.
  • step S144: Yes If the base station has exceeded the allocation cancellation timing of the SR reception beam (step S144: Yes), and if the BSR retransmission request is not required (step S145: Yes), the SR reception beam allocation for the next and subsequent times is performed. (Step S146). On the other hand, the base station transmits a BSR retransmission request to the terminal (step S147) if the SR reception beam allocation cancellation timing is exceeded (step S144: Yes) and a BSR retransmission request is required (step S145: No). ), Return to step S141. The base station determines, for example, whether or not the transmission of the BSR retransmission request is necessary based on the number of transmissions of the BSR retransmission request.
  • the base station determines that the BSR retransmission request to that terminal is necessary.
  • the base station transmits a BSR request, that is, if a predetermined time has not elapsed since the start of the operation according to the flowchart shown in FIG. Judge as necessary.
  • FIG. 16 is a sequence diagram showing a first operation example of the base station 11 and the terminal 12 according to the sixth embodiment.
  • the sequence shown in FIG. 16 represents an operation in the case where the terminal C receiving the BSR request transmits a BSR, and then receives a NACK (Negative ACKnowledgement) for the BSR from the base station.
  • NACK Negative ACKnowledgement
  • the terminal C When the NACK for the BSR transmitted in step S16C is transmitted from the base station (step S61), the terminal C does not cancel transmission of SR at the next transmission timing of SR. In this case, when the uplink user data is generated by the next SR transmission timing, the terminal C transmits an SR to the base station using a radio resource allocated in advance (step S53).
  • the case where the base station transmits NACK for the BSR corresponds to, for example, the case where there is no radio resource that can be allocated to the terminal C.
  • the base station that has transmitted the UL grant to terminal B and transmitted NACK for BSR to terminal C cancels reception of SR at the next SR reception timing for terminal B (step S42).
  • FIG. 17 is a sequence diagram showing a second operation example of the base station 11 and the terminal 12 according to the sixth embodiment.
  • the sequence shown in FIG. 17 represents an operation when the terminal C can not receive the UL grant transmitted from the base station to the terminal C.
  • the same process as that of the sequence shown in FIG. 6 is assigned the same step number.
  • differences from Embodiment 1 will be mainly described.
  • the terminal C When the terminal C can not receive the UL grant for the BSR transmitted in step S16C from the base station (step S17C), the terminal C does not cancel transmission of SR at the next transmission timing of SR. In this case, when the uplink user data is generated by the next SR transmission timing, the terminal C transmits an SR to the base station using a radio resource allocated in advance (step S53). However, as described later, since the base station cancels the reception of the SR transmitted by the terminal C, the base station does not receive the SR transmitted by the terminal C.
  • the base station receives BSR from the terminals B and C (steps S16B and S16C), and transmits a UL grant to the terminals B and C (steps S17B and S17C). Next, the base station cancels the reception of SR from the terminals B and C at the next SR reception timing for the terminals B and C (step S71).
  • FIG. 18 is a sequence diagram showing a third operation example of the base station 11 and the terminal 12 according to the sixth embodiment.
  • the sequence shown in FIG. 18 represents an operation when terminal C receives a BSR retransmission request from the base station.
  • the same process as that of the sequence shown in FIG. 6 is assigned the same step number.
  • differences from Embodiment 1 will be mainly described.
  • the base station receives the BSR from the terminal B and the terminal C (steps S16B and S16C), and transmits the BSR retransmission request to the terminal C when it is necessary to transmit the BSR retransmission request to the terminal C (step S81).
  • the base station disables allocation of the reception beam for the terminal C at the next SR reception timing for the terminal C (step S82).
  • the base station cancels the reception of SR at the next SR reception timing for terminal B (step S42). Since the base station does not need to transmit a BSR retransmission request to terminal B, it transmits a UL grant to terminal B and cancels the reception of SR at the next SR reception timing for terminal B (step S17B, S42).
  • the terminal C Upon receiving the BSR retransmission request, the terminal C disables transmission of SR at the next transmission timing of SR (step S83), and starts retransmission of BSR (step S84). When the retransmission operation is completed, the terminal C enables transmission of SR at the next transmission timing of SR (step S87).
  • the base station when the base station receives the BSR retransmitted by the terminal C (step S85), the base station enables allocation of a reception beam for the terminal C at the next reception timing of SR for the terminal C (step S86).
  • FIG. 19 is a sequence diagram showing a fourth operation example of the base station 11 and the terminal 12 according to the sixth embodiment.
  • the sequence shown in FIG. 19 represents an operation when the terminal C can not receive the BSR request transmitted to the terminal C by the base station.
  • the same process as that of the sequence shown in FIG. 6 is assigned the same step number.
  • differences from Embodiment 1 will be mainly described.
  • the terminal C When the base station can not receive the BSR request transmitted in step S14C, the terminal C does not cancel the transmission of SR at the next transmission timing of SR.
  • the terminal C transmits an SR to the base station using a radio resource allocated in advance (step S53).
  • the base station when the BSR is not received from the terminal to which the BSR request is transmitted (example in FIG. 19), the base station receives the next SR of the terminal. Allocate a beam.
  • the base station receives the BSR, as described in the first embodiment, the base station cancels the allocation of the beam for the next SR reception of the terminal that has transmitted the BSR. Also, if the terminal transmits BSR but can not confirm successful BSR reception at the base station (example in FIG. 17), it does not cancel transmission of SR at the next transmission timing of SR.
  • the terminal transmits the SR in the next SR cycle (the transmission timing of the next SR). And transmission delay of uplink user data can be suppressed. Also, even if the transmission of the UL grant to the BSR fails, the base station does not need to reallocate the next SR and BSR reception beams since the BSR has already been received from the terminal. The same applies to a base station configured to transmit an ACK instead of a UL grant to a BSR.
  • Embodiment 7 In the seventh embodiment, an operation will be described in a case where a terminal to which the above-described BSR request is transmitted is in a DRX (Discontinuous Reception) state.
  • DRX Continuous Reception
  • the transmission / reception circuit In the DRX state, when there is no data to be transmitted / received by the terminal, the transmission / reception circuit is put to sleep to suppress the power consumption of the terminal, and the reception circuit to confirm the presence or absence of the signal transmitted to the base station by the base station. Is returned for a short period of time, and when there is no signal, it returns to the sleep state again, and refers to a state in which it is repeated in a long cycle.
  • a terminal in the DRX state corresponds to a terminal in the low power consumption state in which transmission and reception operations are suspended.
  • the base station 11 determines whether or not each of the other terminals is in the DRX state if there is another terminal existing in the same beam spot as the terminal 12 of the transmission source of the SR after receiving the SR from the terminal 12 Do.
  • the terminal in the DRX state is not included in the transmission target of the BSR request, and only the terminal in the DRX state is included in the transmission target of the BSR request. Further, the operation of the base station after transmitting the subsequent BSR request is the same as that of the first embodiment.
  • the base station 11 determines that a terminal in which communication has not occurred for a predetermined time or more, that is, a terminal that has not performed communication in the past predetermined time is in the DRX state.
  • the terminal 12 in the DRX state Since the terminal 12 in the DRX state does not receive the BSR request from the base station 11, it performs the same operation as that of the conventional terminal.
  • the base station 11 does not transmit the BSR request to the terminal 12 in the DRX state when the terminal 12 as the transmission target of the BSR request is in the DRX state. This makes it possible to prevent unnecessary allocation of a radio resource for transmitting a BSR request to the terminal 12 in the DRX state which can only receive signals in a long cycle.
  • the base station 11 Similar to the base station 11 according to the fourth embodiment described above, the base station 11 according to the present embodiment transmits a BSR request to the terminal 12 that satisfies the predetermined condition, and allocates a radio resource for BSR transmission. It is.
  • the terminal 12 which is not in the DRX state corresponds to the terminal 12 which satisfies the predetermined condition
  • the terminal 12 which is in the DRX state corresponds to the terminal 12 which does not satisfy the predetermined condition.
  • the method in which the base station 11 collectively receives the BSR in units of beam spots shown in the above first to seventh embodiments may be performed simultaneously for a plurality of beam spots instead of one beam spot.
  • the base station 11 may group the plurality of terminals 12 together instead of one terminal 12 as a unit of transmission of the BSR request, and may transmit only one BSR request to the group. In that case, it is assumed that the terminal 12 can identify whether the transmission destination group of the BSR request is addressed to itself.
  • the present invention is described based on the communication sequence of the fourth generation communication system on the premise of the fourth generation communication system, but the communication system as the premise is limited to the fourth generation communication system. is not.
  • a communication system that performs the same control specifically, a base station that performs communication while switching the beam irradiation direction in time division, and each terminal requests a signal from the base station to allocate a radio resource at an individual timing.
  • the present invention can be applied to any communication system that transmits data.
  • the configuration shown in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and one of the configurations is possible within the scope of the present invention. Parts can be omitted or changed.
  • Reference Signs List 10 wireless communication system 11 base stations, 12 terminals, 13 beam spots, 20, 30 control units, 21 terminal search units, 22 resource allocation units, 23, 33 transmission information generation units, 24, 34 transmission / reception units, 25, 35 antennas Part, 31 buffer state management part, 32 transmission control part.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne une station de base (11) comprenant : une unité d'antenne (25) qui forme un faisceau dirigé vers un ou plusieurs points de faisceau tout en changeant la direction d'une manière par répartition dans le temps par rapport à une zone de service comprenant une pluralité de points de faisceau ; une unité de recherche de terminal (21) qui, à réception, d'un premier terminal, d'une demande de programmation demandant une attribution d'une ressource radio pour transmettre un rapport d'état de tampon, recherche un second terminal qui est un autre terminal existant dans le point de faisceau dans lequel se trouve le premier terminal ; et une unité d'attribution de ressources (22) qui attribue, au premier terminal et au second terminal, des ressources radio pour transmettre les rapports d'état de tampon.
PCT/JP2017/028810 2017-08-08 2017-08-08 Station de base, terminal, et procédé d'attribution de ressources radio WO2019030829A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012532483A (ja) * 2009-06-29 2012-12-13 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 無線通信システムにおける方法及び装置
JP2015519821A (ja) * 2012-05-04 2015-07-09 パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ しきい値に基づく電力効率の高いスケジューリング要求手順

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012532483A (ja) * 2009-06-29 2012-12-13 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 無線通信システムにおける方法及び装置
JP2015519821A (ja) * 2012-05-04 2015-07-09 パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ しきい値に基づく電力効率の高いスケジューリング要求手順

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NOKIA ET AL.: "Verizon Wireless, On simultaneous reception of single- beam and multi-beam uplink", 3GPP TSG-RAN WG1#86B RL-1610251, 30 September 2016 (2016-09-30), XP051158891 *

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